diff --git a/transport/vmess/websocket.go b/transport/vmess/websocket.go
index 2487b93a..cc747803 100644
--- a/transport/vmess/websocket.go
+++ b/transport/vmess/websocket.go
@@ -301,6 +301,10 @@ func (wsedc *websocketWithEarlyDataConn) SetWriteDeadline(t time.Time) error {
 	return wsedc.Conn.SetWriteDeadline(t)
 }
 
+func (wsedc *websocketWithEarlyDataConn) LazyHeadroom() bool {
+	return wsedc.Conn == nil
+}
+
 func (wsedc *websocketWithEarlyDataConn) Upstream() any {
 	return wsedc.Conn
 }